Alert archive / Iowa / Severe Thunderstorm Watches in 2000
Severe Thunderstorm Watch 650
The Storm Prediction Center issued this severe thunderstorm watch at Aug 6, 2000, 2:45 PM CDT for 17 counties in Iowa; 16 counties in Missouri. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 6, 2000, 2:45 PM CDT (19:45 UTC)
- Expired
- Aug 6, 2000, 8:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 33 counties
Adams County, IA, Appanoose County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Iowa County, IA, Keokuk County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Adair County, MO, Andrew County, MO, Buchanan County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Knox County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 3:04 PM CDT | Severe Thunderstorm Warning | DMX | Monroe | 41 min |
| Aug 6, 5:13 PM CDT | Severe Thunderstorm Warning | EAX | Harrison | 47 min |
The nearest sounding before it
Omaha, NE (KOAX), launched 12:00Z, 7.8 hours before the alert went out and 227 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 395 J/kg
- Mixed-layer CIN
- -255 J/kg
- Mixed-layer LCL
- 1809 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
346 WWUS9 KMKC 061920 SEL0 MKC WW 061916 IAZ000-MOZ000-070100- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 650 STORM PREDICTION CENTER NORMAN OK 216 PM CDT SUN AUG 6 2000 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF SOUTHERN IOWA NORTHERN MISSOURI EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 245 PM UNTIL 800 PM CDT. HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 55 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 60 MILES WEST SOUTHWEST OF LAMONI IOWA TO 25 MILES EAST SOUTHEAST OF OTTUMWA IOWA. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. OTHER WATCH INFORMATION... CONTINUE...WW 649... DISCUSSION...TSTMS DEVELOPING ALONG COLD FRONT ARE EXPECTED TO BECOME LOCALLY SEVERE GIVEN PRESENCE OF STEEP MID LEVEL LAPSE RATES AND STRONG INSTABILITY. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 29025. ...VESCIO 400,0920 392,0945 410,0945 414,0920
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 1:30 PM CDT | Severe Thunderstorm Watch | SPC | Cedar, Clinton, Delaware, Des Moines, Dubuque, Henry and 11 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Iowa, 2000Severe Thunderstorm Watches in Missouri, 2000Every severe thunderstorm watch in 2000
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.